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c78751338b76d199bf598c9f12aeb65f2eb6a7a1
carbon-lang/toolchain/language_server/testdata/text_document/incremental_sync.carbon
T
Richard Smith c78751338b language-server: Support simple semantic queries. (#7639) 
Add support for "jump to declaration", "find references", type
information on hover. This support is strictly single-file for now; only
references and declarations within the same file are found. We could go
a bit beyond that, but to properly handle cross-file references we'll
need to build an index and a compilation database, which is beyond the
scope of this change.

On hover, we provide the type information for the instruction under the
cursor as-is. This is frequently not very useful, as the type of a
function F is simply "<type of F>", but is a starting point for richer
information.

Assisted-by: Claude Code
2026-08-19 14:35:05 +00:00

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// Part of the Carbon Language project, under the Apache License v2.0 with LLVM
// Exceptions. See /LICENSE for license information.
// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
//
// Content after `didOpen`:
//
// ```
// fn SecondFunCTIonNNN() {}
//
// fn ThirdFn() {}
// ```
//
// After first `didChange`:
//
// ```
// fn SecondFunction() {}
//
// fn ThirdFunction() {}
// ```
//
// After second `didChange`:
//
// ```
// fn SecondFunction() {}
//
// fn ThirdFunction() {}
//
// fn FourthFunction() {}
// ```
//
// After third `didChange`:
//
// ```
// fn FirstFunction() {}
//
// fn SecondFunction() {}
//
// fn ThirdFunction() {}
//
// fn FourthFunction() {}
// ```
//
// Fourth `didChange` replaces full content.
// AUTOUPDATE
// TIP: To test this file alone, run:
// TIP: bazel test //toolchain/testing:file_test --test_arg=--file_tests=toolchain/language_server/testdata/text_document/incremental_sync.carbon
// TIP: To dump output, run:
// TIP: bazel run //toolchain/testing:file_test -- --dump_output --file_tests=toolchain/language_server/testdata/text_document/incremental_sync.carbon
// --- STDIN
[[@LSP-CALL:initialize:"capabilities": {}]]
[[@LSP-NOTIFY:textDocument/didOpen:
"textDocument": {"uri": "file:/test.carbon", "languageId": "carbon",
"text": "fn SecondFunCTIonNNN() {}\n\nfn ThirdFn() {}\n"}
]]
[[@LSP-NOTIFY:textDocument/didChange:
"textDocument": {"uri": "file:/test.carbon"},
"contentChanges": [
{"range": {"start": {"line": 0, "character": 17},
"end": {"line": 0, "character": 20}},
"text": ""},
{"range": {"start": {"line": 0, "character": 12},
"end": {"line": 0, "character": 13}},
"text": "c"},
{"range": {"start": {"line": 0, "character": 13},
"end": {"line": 0, "character": 15}},
"text": "ti"},
{"range": {"start": {"line": 2, "character": 9},
"end": {"line": 2, "character": 9}},
"text": "u"},
{"range": {"start": {"line": 2, "character": 11},
"end": {"line": 2, "character": 11}},
"text": "ction"}
]
]]
[[@LSP-NOTIFY:textDocument/didChange:
"textDocument": {"uri": "file:/test.carbon"},
"contentChanges": [
{"range": {"start": {"line": 3, "character": 0},
"end": {"line": 3, "character": 0}},
"text": "\nfn FourthFunction() {}\n"}
]
]]
[[@LSP-NOTIFY:textDocument/didChange:
"textDocument": {"uri": "file:/test.carbon"},
"contentChanges": [
{"range": {"start": {"line": 0, "character": 0},
"end": {"line": 0, "character": 0}},
"text": "fn FirstFunction() {}\n\n"}
]
]]
[[@LSP-CALL:textDocument/documentSymbol:
"textDocument": {"uri": "file:/test.carbon"}
]]
[[@LSP-NOTIFY:textDocument/didChange:
"textDocument": {"uri": "file:/test.carbon"},
"contentChanges": [
{"text": "fn Foo() {}\n\nfn Bar() {}\n"}
]
]]
[[@LSP-CALL:textDocument/documentSymbol:
"textDocument": {"uri": "file:/test.carbon"}
]]
[[@LSP-CALL:shutdown]]
[[@LSP-NOTIFY:exit]]
// --- AUTOUPDATE-SPLIT
// CHECK:STDOUT: Content-Length: 352{{\r}}
// CHECK:STDOUT: {{\r}}
// CHECK:STDOUT: {
// CHECK:STDOUT: "id": 1,
// CHECK:STDOUT: "jsonrpc": "2.0",
// CHECK:STDOUT: "result": {
// CHECK:STDOUT: "capabilities": {
// CHECK:STDOUT: "declarationProvider": true,
// CHECK:STDOUT: "definitionProvider": true,
// CHECK:STDOUT: "documentSymbolProvider": true,
// CHECK:STDOUT: "hoverProvider": true,
// CHECK:STDOUT: "positionEncoding": "utf-16",
// CHECK:STDOUT: "referencesProvider": true,
// CHECK:STDOUT: "textDocumentSync": 2,
// CHECK:STDOUT: "typeDefinitionProvider": true
// CHECK:STDOUT: }
// CHECK:STDOUT: }
// CHECK:STDOUT: }Content-Length: 144{{\r}}
// CHECK:STDOUT: {{\r}}
// CHECK:STDOUT: {
// CHECK:STDOUT: "jsonrpc": "2.0",
// CHECK:STDOUT: "method": "textDocument/publishDiagnostics",
// CHECK:STDOUT: "params": {
// CHECK:STDOUT: "diagnostics": [],
// CHECK:STDOUT: "uri": "file:///test.carbon"
// CHECK:STDOUT: }
// CHECK:STDOUT: }Content-Length: 144{{\r}}
// CHECK:STDOUT: {{\r}}
// CHECK:STDOUT: {
// CHECK:STDOUT: "jsonrpc": "2.0",
// CHECK:STDOUT: "method": "textDocument/publishDiagnostics",
// CHECK:STDOUT: "params": {
// CHECK:STDOUT: "diagnostics": [],
// CHECK:STDOUT: "uri": "file:///test.carbon"
// CHECK:STDOUT: }
// CHECK:STDOUT: }Content-Length: 144{{\r}}
// CHECK:STDOUT: {{\r}}
// CHECK:STDOUT: {
// CHECK:STDOUT: "jsonrpc": "2.0",
// CHECK:STDOUT: "method": "textDocument/publishDiagnostics",
// CHECK:STDOUT: "params": {
// CHECK:STDOUT: "diagnostics": [],
// CHECK:STDOUT: "uri": "file:///test.carbon"
// CHECK:STDOUT: }
// CHECK:STDOUT: }Content-Length: 144{{\r}}
// CHECK:STDOUT: {{\r}}
// CHECK:STDOUT: {
// CHECK:STDOUT: "jsonrpc": "2.0",
// CHECK:STDOUT: "method": "textDocument/publishDiagnostics",
// CHECK:STDOUT: "params": {
// CHECK:STDOUT: "diagnostics": [],
// CHECK:STDOUT: "uri": "file:///test.carbon"
// CHECK:STDOUT: }
// CHECK:STDOUT: }Content-Length: 1741{{\r}}
// CHECK:STDOUT: {{\r}}
// CHECK:STDOUT: {
// CHECK:STDOUT: "id": 2,
// CHECK:STDOUT: "jsonrpc": "2.0",
// CHECK:STDOUT: "result": [
// CHECK:STDOUT: {
// CHECK:STDOUT: "kind": 12,
// CHECK:STDOUT: "name": "FirstFunction",
// CHECK:STDOUT: "range": {
// CHECK:STDOUT: "end": {
// CHECK:STDOUT: "character": 21,
// CHECK:STDOUT: "line": 0
// CHECK:STDOUT: },
// CHECK:STDOUT: "start": {
// CHECK:STDOUT: "character": 0,
// CHECK:STDOUT: "line": 0
// CHECK:STDOUT: }
// CHECK:STDOUT: },
// CHECK:STDOUT: "selectionRange": {
// CHECK:STDOUT: "end": {
// CHECK:STDOUT: "character": 16,
// CHECK:STDOUT: "line": 0
// CHECK:STDOUT: },
// CHECK:STDOUT: "start": {
// CHECK:STDOUT: "character": 3,
// CHECK:STDOUT: "line": 0
// CHECK:STDOUT: }
// CHECK:STDOUT: }
// CHECK:STDOUT: },
// CHECK:STDOUT: {
// CHECK:STDOUT: "kind": 12,
// CHECK:STDOUT: "name": "SecondFunction",
// CHECK:STDOUT: "range": {
// CHECK:STDOUT: "end": {
// CHECK:STDOUT: "character": 22,
// CHECK:STDOUT: "line": 2
// CHECK:STDOUT: },
// CHECK:STDOUT: "start": {
// CHECK:STDOUT: "character": 0,
// CHECK:STDOUT: "line": 2
// CHECK:STDOUT: }
// CHECK:STDOUT: },
// CHECK:STDOUT: "selectionRange": {
// CHECK:STDOUT: "end": {
// CHECK:STDOUT: "character": 17,
// CHECK:STDOUT: "line": 2
// CHECK:STDOUT: },
// CHECK:STDOUT: "start": {
// CHECK:STDOUT: "character": 3,
// CHECK:STDOUT: "line": 2
// CHECK:STDOUT: }
// CHECK:STDOUT: }
// CHECK:STDOUT: },
// CHECK:STDOUT: {
// CHECK:STDOUT: "kind": 12,
// CHECK:STDOUT: "name": "ThirdFunction",
// CHECK:STDOUT: "range": {
// CHECK:STDOUT: "end": {
// CHECK:STDOUT: "character": 21,
// CHECK:STDOUT: "line": 4
// CHECK:STDOUT: },
// CHECK:STDOUT: "start": {
// CHECK:STDOUT: "character": 0,
// CHECK:STDOUT: "line": 4
// CHECK:STDOUT: }
// CHECK:STDOUT: },
// CHECK:STDOUT: "selectionRange": {
// CHECK:STDOUT: "end": {
// CHECK:STDOUT: "character": 16,
// CHECK:STDOUT: "line": 4
// CHECK:STDOUT: },
// CHECK:STDOUT: "start": {
// CHECK:STDOUT: "character": 3,
// CHECK:STDOUT: "line": 4
// CHECK:STDOUT: }
// CHECK:STDOUT: }
// CHECK:STDOUT: },
// CHECK:STDOUT: {
// CHECK:STDOUT: "kind": 12,
// CHECK:STDOUT: "name": "FourthFunction",
// CHECK:STDOUT: "range": {
// CHECK:STDOUT: "end": {
// CHECK:STDOUT: "character": 22,
// CHECK:STDOUT: "line": 6
// CHECK:STDOUT: },
// CHECK:STDOUT: "start": {
// CHECK:STDOUT: "character": 0,
// CHECK:STDOUT: "line": 6
// CHECK:STDOUT: }
// CHECK:STDOUT: },
// CHECK:STDOUT: "selectionRange": {
// CHECK:STDOUT: "end": {
// CHECK:STDOUT: "character": 17,
// CHECK:STDOUT: "line": 6
// CHECK:STDOUT: },
// CHECK:STDOUT: "start": {
// CHECK:STDOUT: "character": 3,
// CHECK:STDOUT: "line": 6
// CHECK:STDOUT: }
// CHECK:STDOUT: }
// CHECK:STDOUT: }
// CHECK:STDOUT: ]
// CHECK:STDOUT: }Content-Length: 144{{\r}}
// CHECK:STDOUT: {{\r}}
// CHECK:STDOUT: {
// CHECK:STDOUT: "jsonrpc": "2.0",
// CHECK:STDOUT: "method": "textDocument/publishDiagnostics",
// CHECK:STDOUT: "params": {
// CHECK:STDOUT: "diagnostics": [],
// CHECK:STDOUT: "uri": "file:///test.carbon"
// CHECK:STDOUT: }
// CHECK:STDOUT: }Content-Length: 873{{\r}}
// CHECK:STDOUT: {{\r}}
// CHECK:STDOUT: {
// CHECK:STDOUT: "id": 3,
// CHECK:STDOUT: "jsonrpc": "2.0",
// CHECK:STDOUT: "result": [
// CHECK:STDOUT: {
// CHECK:STDOUT: "kind": 12,
// CHECK:STDOUT: "name": "Foo",
// CHECK:STDOUT: "range": {
// CHECK:STDOUT: "end": {
// CHECK:STDOUT: "character": 11,
// CHECK:STDOUT: "line": 0
// CHECK:STDOUT: },
// CHECK:STDOUT: "start": {
// CHECK:STDOUT: "character": 0,
// CHECK:STDOUT: "line": 0
// CHECK:STDOUT: }
// CHECK:STDOUT: },
// CHECK:STDOUT: "selectionRange": {
// CHECK:STDOUT: "end": {
// CHECK:STDOUT: "character": 6,
// CHECK:STDOUT: "line": 0
// CHECK:STDOUT: },
// CHECK:STDOUT: "start": {
// CHECK:STDOUT: "character": 3,
// CHECK:STDOUT: "line": 0
// CHECK:STDOUT: }
// CHECK:STDOUT: }
// CHECK:STDOUT: },
// CHECK:STDOUT: {
// CHECK:STDOUT: "kind": 12,
// CHECK:STDOUT: "name": "Bar",
// CHECK:STDOUT: "range": {
// CHECK:STDOUT: "end": {
// CHECK:STDOUT: "character": 11,
// CHECK:STDOUT: "line": 2
// CHECK:STDOUT: },
// CHECK:STDOUT: "start": {
// CHECK:STDOUT: "character": 0,
// CHECK:STDOUT: "line": 2
// CHECK:STDOUT: }
// CHECK:STDOUT: },
// CHECK:STDOUT: "selectionRange": {
// CHECK:STDOUT: "end": {
// CHECK:STDOUT: "character": 6,
// CHECK:STDOUT: "line": 2
// CHECK:STDOUT: },
// CHECK:STDOUT: "start": {
// CHECK:STDOUT: "character": 3,
// CHECK:STDOUT: "line": 2
// CHECK:STDOUT: }
// CHECK:STDOUT: }
// CHECK:STDOUT: }
// CHECK:STDOUT: ]
// CHECK:STDOUT: }Content-Length: 51{{\r}}
// CHECK:STDOUT: {{\r}}
// CHECK:STDOUT: {
// CHECK:STDOUT: "id": 4,
// CHECK:STDOUT: "jsonrpc": "2.0",
// CHECK:STDOUT: "result": null
// CHECK:STDOUT: }
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